Missing files for highlight Notepad++, GTK2 and GTK3

[mingodad]

Looking through https://cenotelie.fr/projects/hime/edition I noticed that this links are dead:

• https://cenotelie.fr/releases/Notepadpp_Grammar.xml
• https://cenotelie.fr/releases/gtk2_hgram.lang
• https://cenotelie.fr/releases/gtk3_hgram.lang

Also I've added the hime grammar to https://mingodad.github.io/parsertl-playground/playground/ an Yacc/Lex compatible online editor/tester (select Hime parser from Examples then click Parse to see a parser tree for the content in Input source).

While testing the grammars in https://github.com/cenotelie/hime-grams I probably found a mistake reported here cenotelie/hime-grams#2 .

Any feedback is welcome !